On 15/11/20 11:41 am, Karl Auer wrote:
... Are you saying these guys
have not invented what they say they have?
No they did not invent directional audible sound using ultrasonics.
Pompei, F. J. (1999). The use of airborne ultrasonics for generating
audible sound beams. Journal of the Audio Engineering Society, 47(9),
726-731. http://www.aes.org/e-lib/browse.cfm?elib=12092
But it takes a lot of processing power and equipment to do and if the
company can turn this into an affordable product, it will be impressive.
Students at ANU have worked in the processing needed for phased array
radar for the Australian and US military, which works on the same principle.
... participant would still be talking ...
Perhaps out of phase sound could be sent by the same system, so the
speaker's voice would be muffled.
It doesn't really generate sound in people's heads ...
Yes, hearing sounds from their fillings works differently (if it works
at all).
Comedian and TV producer Lucille Ball claimed to have intercepted
signals from Japanese spies in WWII through her fillings and reported it
to the FBI.
Her company went on to produce the original series of Star Trek, so it
is surprising Captain Kirk did not have a tooth mounted communicator. ;-)
https://entertainment.howstuffworks.com/lucille-ball-fillings-spy.htm
--
Tom Worthington, MEd FHEA FACS CP IP3P http://www.tomw.net.au
+61(0)419496150
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Honorary Lecturer, Computer Science, Australian National University
https://cecs.anu.edu.au/research/profile/tom-worthington
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